Hi, our family is new to RV'ing. We are trying to take our first long distance trip, and are now stuck in a Walmart parking lot. We have a 1994 30' Seabreeze motorhome, and the right rear axle went out on us. My brother in law, who's a master mechanic is with us, but we can't find the part we need anywhere. We've had 2 different ones overnighted to us that we're wrong, although the specs showed it as right. We need a 39" straight axle shaft. Any advice or suggestions?